Acids Quiz
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5 questions, one answer each
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1. What pH range describes an alkaline solution?
- A. Below 7
- B. Exactly 7
- C. Above 7
- D. 0 to 3 only
2. What colour does methyl orange turn in an acidic solution?
- A. Blue
- B. Red
- C. Yellow
- D. Colourless
3. What is formed when an acid reacts with a metal carbonate?
- A. Salt and hydrogen only
- B. Salt and water only
- C. Salt, water and carbon dioxide
- D. Salt and oxygen
4. Why must titration be used to prepare a soluble salt from an acid and a soluble base, rather than adding excess and filtering?
- A. Because both reactants are soluble, so excess cannot be removed by filtration
- B. Because the reaction is too slow
- C. Because a precipitate always forms
- D. Because acids cannot react with soluble bases
5. A student mixes barium chloride solution with sodium sulfate solution. Using solubility rules, what happens?
- A. No reaction occurs
- B. A precipitate of barium sulfate forms, as barium sulfate is insoluble
- C. A precipitate of sodium chloride forms
- D. A gas is produced